CN101960740A - Method of efficient power boosting - Google Patents
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- CN101960740A CN101960740A CN2009801070121A CN200980107012A CN101960740A CN 101960740 A CN101960740 A CN 101960740A CN 2009801070121 A CN2009801070121 A CN 2009801070121A CN 200980107012 A CN200980107012 A CN 200980107012A CN 101960740 A CN101960740 A CN 101960740A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/16—Deriving transmission power values from another channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/32—TPC of broadcast or control channels
- H04W52/325—Power control of control or pilot channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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- H—ELECTRICITY
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Abstract
An efficient power boosting method is provided. In the method, a first resource element for boosting power, a second resource element for achieving synchronization with a specific channel, and a third resource element for transmitting data are allocated to a predetermined resource region. Then, power of at least one of the second resource element and the third resource element is boosted using power allocated to the first resource element and information is transmitted using the predetermined resource region.
Description
Technical field
The present invention relates to a kind of wireless access system.
Background technology
It hereinafter is concise and to the point description to normally used guide symbol and pilot channel.
Guide symbol is not modulated spread-spectrum signal.Guide symbol is the starter system operation signal of the mobile radio station (MS) (portable terminal or subscriber equipment (UE)) operated in the cell range of base station (or Node B).Guide symbol can be used to finish phase place, frequency or the time synchronized of signal of base station, and can be used for the channel estimating of down link and up link.Mobile radio station constantly monitors guide symbol, and the size of cell area can change according to the level of launching guide symbol.
Because MS uses guide symbol to realize carrier phase synchronization, with other channel signals of demodulation, so preferably the power of guide symbol is remained on the high level.Yet, when the ratio of guide symbol power is high, can produces between the adjacent cell in many cell environments and disturb.Keep suitable power level just very important when therefore, using guide symbol.Dissimilar guide symbol structure and code are used in base station in many cell environments, thereby minimize interference therebetween, and make mobile radio station can distinguish the base station.
The channel that can use in wireless access system has hereinafter briefly been described.The channel that uses in forward link comprises: pilot channel, synchronizing channel, paging channel and Traffic Channel.The channel that uses in reverse link comprises: access channel and Traffic Channel.In forward link, use Walsh (walsh) sign indicating number to distinguish channel, and in reverse link, use long code to distinguish.
Pilot channel be used to make mobile radio station realize and the base station between carrier phase synchronization, and obtain base station information (for example, radio channel information) and emission by base station or mobile radio station prearranged signal.
Provide pilot channel to each base station or sector.The base station is the transmit steering signal regularly and constantly, and also transmit steering signal on specified time interval of mobile radio station.According to system, can use pilot signal with different forms.For example, can use pilot signal with the walsh code form.Be used for the predetermined walsh code of pilot channel by use, mobile radio station can use guide symbol to obtain channel information.
Summary of the invention
Technical problem
The one object of the present invention that design solves problem in the above-mentioned conventional art is to provide a kind of method that is used for efficient lifting pilot power.
Another object of the present invention is to provide a kind of method of the power level of guide symbol that be used for changing flexibly with efficient use cell coverage area and transmitting power.
Another object of the present invention is to provide a kind of and be used for changing flexibly the power level of guide symbol so that the method for enough power gains to be provided by use gross power and total bandwidth.
Another object of the present invention is to provide a kind of, come the method for highland lifting pilot power as far as possible by using the optimization power ratio between the data symbol.
Technical solution
In order to realize above purpose, the invention provides multiple method for enhancing power.
In one aspect of the invention, above-mentioned purpose can realize by the method that is provided for efficient lifting guide symbol power, described method comprises: divide be used in bring to power at least one first resource element (for example, empty RE), be used to realize and particular channel between synchronous at least one second resource element (for example, guide symbol) and at least one information resources element in predetermined resource district (for example be used for data transmission, data RE), distribute to the power of first resource element by use, promote in second resource element and the information resources element power of at least one, and use predetermined resource-area to come emission information.
First resource element can be used for the interference that caused in many cell environments measure neighbor base station.Herein, the predetermined resource district can comprise first sign field and second sign field, described first sign field comprises at least one first resource element, at least one second resource element and at least one information resources element, and described second sign field comprises at least one information resources element.In addition, can determine the number of at least one second resource element according to the number of transmitting antenna.
The predetermined resource district may further include: the 3rd sign field, described the 3rd sign field comprises second resource element and information resources element., can be transmitted in second resource element that comprises in first sign field herein, and can be transmitted in second resource element that comprises in the 3rd sign field via the 3rd transmitting antenna and the 4th transmitting antenna via first transmitting antenna and second transmitting antenna.
The step of bring to power can comprise: bring to power under the situation of the number of considering at least one resource element and the controlling elements how many power controlling promotes.
Use value (q) is calculated information resources element that comprises and the power ratio (α) between the information resources element that comprises in described second sign field in first sign field, described value (q) be by the resource element that will in first sign field, comprise sum (m) divided by: the sum of resource element (m) deducts the number (e) of at least one first resource element that comprises in first sign field and number (r) value that sum obtained of at least one second resource element obtains.
The step of bring to power can comprise: all power that will distribute to first resource element are reallocated to second resource element.
The step of bring to power can comprise: the power that will distribute to first resource element is reallocated to second resource element and information resources element with estimated rate.
Under the situation of the sum of the resource element that can in considering first symbol area, comprise and the number of at least one second resource element, determine the number of at least one first resource element.
The step of bring to power can comprise: the part power that will distribute to first and second resource elements is reallocated to second resource element.
Beneficial effect
By embodiments of the invention are applied to wireless system, can realize following advantage.
At first, can promote the power of distributing to guide symbol efficiently.
The second, increased owing to distribute to the power of guide symbol, therefore can increase the cell coverage area of base station.Can also increase the channel estimating performance that is used for Data Receiving.
The 3rd and since flexible Application the power level of guide symbol, therefore can realize enough power gains by using gross power and total bandwidth.
The 4th, owing to the optimization power ratio of having used between the data symbol, therefore the highland promotes pilot power as far as possible.
The 5th, networking component can transmit and receive data efficiently by using the method for suggestion in an embodiment of the present invention.
Description of drawings
The embodiments of the invention that have been used to provide description of drawings in further understanding of the present invention has been included in, and be used from explanation one and explain principle of the present invention.
In the accompanying drawings:
Fig. 1 has illustrated the exemplary method that is used to shine upon downlink reference signals.
Fig. 2 has illustrated the exemplary method that is used to shine upon down link guide symbol and empty RE according to another embodiment of the present invention.
Fig. 3 has illustrated the exemplary method that is used to shine upon down link guide symbol and empty RE according to another embodiment of the present invention.
Fig. 4 has illustrated the exemplary method that is used to shine upon down link guide symbol and empty RE according to another embodiment of the present invention.
Fig. 5 has illustrated the exemplary method that is used to shine upon down link guide symbol and empty RE according to another embodiment of the present invention.
Fig. 6 explanation is used for the method for bring to power according to another embodiment of the present invention.
Embodiment
The present invention relates to wireless access system.
By provide following examples with assembly of the present invention and characteristics combination together with particular form.If not offer some clarification on, can think that assembly of the present invention or feature are optional.Assembly or feature can with under other assemblies or the characteristics combination situation together not implemented.Can also be by provide embodiments of the invention together with some assembly and/or characteristics combination.Can the order of the following operation of describing in embodiments of the present invention be changed.Some assembly or feature among embodiment can be included among another embodiment, perhaps can replace with corresponding assembly among another embodiment or feature.
In below in conjunction with the accompanying drawing description of this invention, for making fuzzy process of theme of the present invention or step and the process that it will be appreciated by those skilled in the art that or step will not do description.
The data communications context that will mainly concentrate between mobile radio station (MS) and base station (BS) is described embodiments of the invention.BS is the terminal node in the network, and it is directly carried out and the communicating by letter of terminal.Will be described to also can carry out when needed by upper layer node by the performed specific operation of BS.
That is, be apparent that BS or any other network node can be carried out the multiple operation that communicates with MS of being used in comprising a plurality of network nodes network of (comprising BS) for those skilled in the art.Term " base station (BS) " can be replaced with other terms, such as " fixed station ", " Node B ", " e Node B (eNB) " or " access point ".Also term " mobile radio station (MS) " can be replaced with other terms, such as " subscriber equipment (UE) ", " mobile subscriber station (MSS) ", " terminal " or " portable terminal ".
In addition, term " transmitting terminal " refers to launch the node of data or audio service, and " receiving terminal " finger is received the node of data or audio service.Therefore, in up link, MS can be a transmitting terminal, and BS can be a receiving terminal.Similarly, in down link, MS can be a receiving terminal, and BS can be a transmitting terminal.
PDA(Personal Digital Assistant), cell phone, personal communication service (PCS) phone, global mobile system (GSM) phone, wideband CDMA (WCDMA) phone, mobile broadband system (MBS) phone etc. can be used as MS of the present invention.
Can implement embodiments of the invention with multiple means.For example, embodiment can implement with hardware, firmware, software or its random component.
Implementing with hardware in the situation of the present invention, can wait the method for implementing according to the embodiment of the invention with one or more application-specific integrated circuit (ASIC)s (ASIC), digital signal processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor.
In with firmware or software implementation situation of the present invention, can be that module, process, the function of carrying out above-mentioned feature or operation waits the method for implementing according to the embodiment of the invention with form.Software code can be stored in the memory cell, so that carry out by processor.It is inner or outside that memory cell can be positioned at processor, and can carry out communicating by letter of data with processor via multiple known way.
Embodiments of the invention can be supported by at least one the standard document in IEEE 802 systems, 3GPP system, 3GPP LTE system, the 3GPP2 system (being wireless access system).That is, in order clearly to describe spirit of the present invention, step of describing in an embodiment of the present invention or part can not supported by standard document.For all terms that in the disclosure, use, can the normative reference document.
The particular term of Shi Yonging provides and is used for understanding better the present invention in the following description, and under the premise without departing from the spirit of the present invention, replaceable is other terms.
In an embodiment of the present invention, term " guide symbol " can exchange with other multiple terms and use.For example, term " guide symbol " can exchange with term " reference signal (RS) " or " steering signal " and use.Guide symbol can indicate be used for realizing with base station (BS) between synchronous and obtain any signal of the information of BS.
The specific resources district is described in an embodiment of the present invention.For example, resource-area can be used for transmitting down link or uplink data and reference signal (or pilot signal).A Resource Block (RB) can comprise one or more resource elements (RE).According to user's needs or channel circumstance, the size of RB and the size of RE can change to some extent.
A RB of Shi Yonging can comprise 6 subcarriers or 14 OFDMs (OFDM) symbol in an embodiment of the present invention.Herein, a RE can comprise a subcarrier and an OFDM symbol.
Fig. 1 has illustrated the exemplary method that is used to shine upon downlink reference signals.
Particularly, Fig. 1 has illustrated the mapping method when having used four transmitting antennas in multiaerial system.In the example of Fig. 1, the total data power of supposing the OFDM symbol that does not comprise reference signal (RS) is E
B, and comprise that the total data power of the OFDM symbol of reference signal (RS) is E
AIn the following description, will not comprise that also the OFDM symbol of RS is called " non-RSOFDM symbol ", will comprise that the OFDM symbol of RS also is called " RS OFDM symbol ".Herein, E
AAnd E
BBetween relation be expressed as follows.
[formula 1]
E
A＝(1-η
RS)E
B
In formula 1, η
RSThe ratio of representing the gross power of total RS power and RS OFDM symbol.Make (P
B, kN
B, k) be the pairing of the number of the allocation of subcarriers that in non-RS OFDM symbol, is used for the energy (EPRE) of every resource element of k user and data RE, and make (P
A, kN
A, k) be the pairing of number of the allocation of subcarriers of EPRE in RS OFDM symbol and data RE.That is N,
B, kBe illustrated in the RE number of distribute data in the non-RS OFDM symbol, and N
A, kBe illustrated in the RE number of distribute data in the RS OFDM symbol.In addition, N
RSThe reference signal (RS) of OFDM symbol or the number of guide symbol are distributed in expression.
Below be to distribute to the specific descriptions of the power of data with the method for lifting guide symbol (or RS) power to being used for convergent-divergent.
In the 2Tx system with two transmitting antennas and having in the 4Tx system of four transmitting antennas, can use multiple bring to power ratio (α).Yet, suppose in an embodiment of the present invention, use the bring to power ratio of expression in formula 2.
[formula 2]
Can give the RS symbol with two subcarrier allocation in six subcarriers of each RS OFDM symbol.In this guiding structural,
Therefore, RS bring to power ratio (α) is represented as formula 2.In formula 2, P
A, kBe illustrated in the energy that is used for each data RE of k MS or subscriber equipment (UE) in the RS OFDM symbol, and P
B, kBe illustrated in the energy that is used for k MS in the non-RS OFDM symbol.Herein, k=1,2 ..., K, and " K " is the sum of the RE of plan.If use the power ratio of formula 2, then in RS OFDM symbol and non-RS OFDM symbol, can use maximum power.
The bring to power ratio (α) that uses in having the 1Tx system of a transmitting antenna is expressed as formula 3.
[formula 3]
In six subcarriers of each RS OFDM symbol one can be distributed to the RS symbol.In this guiding structural,
Therefore, RS bring to power ratio (α) is expressed as formula 3.
Can obtain the business of other antennas and other OFDM symbols and the ratio of guiding (T2P) based on formula 2 and 3.T2P ratio table registration is according to the ratio of RE power with guiding RE power.
Following table 1 has illustrated the T2P ratio in having the 1Tx system of a transmitting antenna.
[table 1]
In table 1, " i " expression OFDM notation index, i=1 wherein, 2 ..., 14, and " t " expression transmitting antenna index.Herein, the value of " i " changes according to the RB size, and the RB size can change according to user's needs or communication environment.
As shown in table 1, RS is included in the OFDM symbol with index 1,5,8 and 12 among the specific RB, and wherein the T2P ratio is
Following table 2 has illustrated the T2P ratio in having the 2Tx system of two transmitting antennas.
[table 2]
As shown in table 2, the OFDM symbol with index 1,5,8 and 12 comprises RS, and the OFDM symbol of data represented only to carry in remaining notation index.T2P ratio with the OFDM symbol of index 1,5,8 and 12 and all the other OFDM symbols is as shown in table 2.
Following table 3 has illustrated the T2P ratio in having the 4Tx system of four transmitting antennas.
[table 3]
As shown in table 3, the OFDM symbol with index 1,2,5,8,9 and 12 comprises RS, and the OFDM symbol of data represented only to carry in remaining notation index.T2P ratio with the OFDM symbol of index 1,2,5,8,9 and 12 and residue OFDM symbol is as shown in table 3.
The example of following table 4 explanations is that wherein different T2P ratios is used for antenna and the OFDM symbol in the 4Tx system with four transmitting antennas.
[table 4]
As seen from Table 4, first transmitting antenna and second transmitting antenna (t=0,1) use identical T2P ratio, and the 3rd transmitting antenna and the 4th transmitting antenna (t=2,3) use identical T2P ratio.In addition, be used for the different T2P ratio of each OFDM symbol in each antenna in the antenna of operation in pairs, thereby realize that efficient RS conduct power promotes.
As shown in table 4, the RS symbol that is used for first and second transmitting antennas is included in the OFDM symbol with index 1,5,8 and 12, and the RS symbol that is used for third and fourth transmitting antenna is included in the OFDM symbol with index 2 and 9.Therefore,, can be used for each OFDM symbol of each transmitting antenna, obtain the ratio of guide symbol power and data power by using table 4.
Hereinafter be to being used for by using empty RE to promote the specific descriptions of the method for guide symbol power.
In an embodiment of the present invention, empty RE can be used to promote the power of RS symbol, or measures the level of many area interference.Number and the position of empty RE can change according to user's needs or communication environment.
In an embodiment of the present invention, (the N that comprises similar number as each RB of supposition
Empty) during empty RE, can on m-subcarrier basis, distribute empty RE.For example, r RE among m RE can be N
EmptyIndividual RE.These skies RE can be used for the switching manipulation of RS OFDM symbol.Yet, do not comprising RS but only comprising in the OFDM symbol of data RE, be difficult to use empty RE.
Fig. 2 has illustrated the exemplary method that is used to shine upon down link guide symbol and empty RE according to another embodiment of the present invention.
Particularly, Fig. 2 has illustrated when the number of transmitting antenna is 1, the mapping method in the situation of the empty RE of each OFDM symbol use that comprises the guide symbol that is used for first transmitting antenna (antenna #0).As shown in Figure 2, in the method, guide symbol is distributed to the OFDM symbol with index 1,5,8 and 12, and will be used for the empty RE that guide symbol promotes and distribute to the OFDM symbol one by one.Certainly, the number of the empty RE that has distributed and position can change.
Fig. 3 has illustrated the exemplary method that is used to shine upon down link guide symbol and empty RE according to another embodiment of the present invention.
Particularly, Fig. 3 has illustrated when the number of transmitting antenna is 2, the mapping method in the situation of the empty RE of each OFDM symbol use that comprises the guide symbol (RO and R1) that is used for first transmitting antenna (antenna #0) and second transmitting antenna (antenna # 1).In the method for Fig. 3, the guide symbol that will be used for first and second transmitting antennas is distributed to same OFDM symbol, and empty RE can be distributed to same OFDM symbol, to promote guide symbol.
The method that is different from Fig. 3 can be distributed to different OFDM symbols with the guide symbol that is used for second transmitting antenna (R1) with the guide symbol (R0) that is used for first transmitting antenna.The number that is used for the empty RE of each guide symbol can change according to user's needs or channel circumstance.
Fig. 4 has illustrated the exemplary method that is used to shine upon down link guide symbol and empty RE according to another embodiment of the present invention.
In the method for Fig. 4, use empty RE at each the OFDM symbol that comprises the guide symbol (R0 and R1) that is used for first transmitting antenna and second transmitting antenna, and use non-NULL RE at each the OFDM symbol that comprises the guide symbol (R2 and R3) that is used for the 3rd transmitting antenna (antenna #2) and the 4th transmitting antenna (antenna #3).
Certainly, non-NULL RE can use at each the OFDM symbol that comprises the guide symbol that is used for first transmitting antenna and second transmitting antenna, and empty RE can use at each the OFDM symbol that comprises the guide symbol that is used for the 3rd transmitting antenna and the 4th transmitting antenna.The number of the empty RE that has distributed can change according to user's needs or channel circumstance.
Fig. 5 has illustrated the exemplary method that is used to shine upon down link guide symbol and empty RE according to another embodiment of the present invention.
The method of Fig. 5 and Fig. 4's is basic identical.Yet in the method for Fig. 5, empty RE is used for each guide symbol.That is, empty RE is distributed to each the OFDM symbol that distributes guide symbol, thereby promote guide symbol power.
It hereinafter is the description that is promoted the method for guide symbol being used to shown in Fig. 2 to 5.
In 2Tx system with have the data power of the OFDM symbol that is comprising guide symbol in the 4Tx system of four transmitting antennas and do not comprise that the ratio α between the data power of OFDM symbol of guide symbol is expressed as following formula with two transmitting antennas.
[formula 4]
Can give RS with two subcarrier allocation in the subcarrier of each RS OFDM symbol.Therefore,
Particularly, the ratio between the energy (power) of the data RE of the energy (power) of the data RE of the indication of the guide symbol power ascension ratio α in the formula 4 RS OFDM symbol and non-RS OFDM symbol.
In formula 4, η '
RSBe to be used for guide symbol it has been added by empty RE to produce and the ratio of the gross power of the gross power of the excess power of storage and RS OFDM symbol.Herein, shown in following formula 5, be all to be used to promote the power of guide symbol by the excess power that empty RE produced, still to distribute to guide symbol and data symbol, determine by the β value.Therefore, power can be not used in the symbol that has distributed empty RE.That is, can memory allocation give the energy of empty RE to be used to promote the power of other symbols.
Following formula 5 has represented to be used to calculate η '
RSExample equation.
[formula 5]
As shown in Equation 5, power that can be by will distributing to sky RE divided by the total number of sub-carriers that in symbol, comprises obtain on duty with β, add η
RSDraw η '
RS
Can re-use the energy of distributing to sky RE for multiple purpose.For example, the energy of distributing to sky RE can be used to promote RS power, is used to promote data RE power and is used to promote RS and data RE power.Can control the power that re-uses of empty RE by the controlling elements β that is used for the energy use.
When in formula 5 β being set at " 0 ", the power of the empty RE that has stored is not used in and promotes RS power.On the other hand, when β was set at " 1 ", the power of the empty RE that has stored only was used to promote RS power.When the value that β is set between " 0 " and " 1 ", also the power division of the empty RE that will store is given data RE.Therefore, data RE power can be adjusted into desired value.
Therefore, even when in RB, comprising sky RE, also can keep data RE power constant.In order to simplify the power ascension process, can be according to system's fixing Beta value.In this example, can also change the β value with dynamic or non-dynamical fashion.Can change the β value, so as to become MS specific or BS specific.
[formula 6]
Particularly, the ratio α of the power of the power of formula 6 expression RS OFDM symbols and non-RS OFDM symbol.An allocation of symbols that is used for RS can be given six subcarriers of each RS OFDM symbol.Therefore,
Can use formula 4 to 6 to draw the service symbol power in other antennas and other OFDM symbols and the ratio of guide symbol power.Following table 5 to 8 has illustrated and has been used for according to number of transmit antennas with at the OFDM of subframe notation index the formula of the optimization power ratio between calculated data and the RS RE.
[table 5]
Table 5 has illustrated the T2P ratio when the number of transmitting antenna is 1.In table 5, " i " expression OFDM notation index, i=1 wherein, 2 ..., 14, and " t " expression transmitting antenna index.Herein, the value of " i " changes according to the RB size, and the RB size can change according to user's needs or communication environment.
Following table 6 has illustrated the T2P ratio in having the 2Tx system of two transmitting antennas.
[table 6]
The RS that will be used for first and second transmitting antennas distributes to the different sub carrier of prosign.Particularly, notation index 1,5,8 and 12 indications comprise the OFDM symbol of RS, and the indication of remaining notation index only comprises the OFDM symbol of data RE.
In having the 4Tx structure of four transmitting antennas, different power modes can be applied to antenna.Particularly, can adopt two options, such as even power emission pattern (identical therein transmitting power is used for each antenna) and non-homogeneous power emission pattern.Be assigned in the situation of data RE at the power of distributing to sky RE, power mode can change according to distributing to how much power of specific antenna.
For example, evenly the power emission pattern is the pattern of therein the power uniform distribution of empty RE being given each antenna, and non-homogeneous power emission pattern is therein the power of empty RE only to be distributed to the pattern of specific antenna.These two kinds of options have himself advantage.Therefore, preferably use one or more in these two options according to channel circumstance and system.
Following table 7 has illustrated the T2P ratio of the even power emission pattern in having the 4Tx system of four transmitting antennas.
[table 7]
Table 7 is applied to even power emission pattern.As seen from Table 7, the RS with each transmitting antenna distributes to same OFDM symbol.Can give each RS with the power uniform distribution of distributing to sky RE herein.
Following table 8 has illustrated the T2P ratio of the non-homogeneous power emission pattern in having the 4Tx system of four transmitting antennas.
[table 8]
Particularly, table 8 has illustrated that the energy distribution that will distribute to sky RE gives the example of RS.As seen from Table 8, the Rs that is used for first and second transmitting antennas (t=0,1) is included in the OFDM symbol with index 1,5,8 and 12, and the RS that is used for third and fourth transmitting antenna (t=2,3) is included in the OFDM symbol with index 2 and 9.
Generally speaking, can be with the power (P of two data RE
B, kAnd P
A, k) between ratio α signaled to mobile radio station (MS) or the UE that is used for decoded symbol data.Signaling channel can only be used to indicate the α value.Therefore, preferably MS and BS (or Node B) have known the set of being scheduled to the α value.If the set of the known road of MS and BS α value then only has the index corresponding to the α value to be launched, thereby has simplified data transmission.
Although Fig. 7 and 8 has illustrated RS wherein and has been included in the example of 6 OFDM symbols, according to channel circumstance or user's needs, can differently be applied in number and the position of distributing the OFDM symbol of RS among the RB.
Following table 9 has illustrated the example collection of the predetermined η RS value in the example that does not use empty RE.
[table 9]
| Index | η RS |
| 00 | 1/6 |
| 01 | 1/3 |
| 10 | 1/2 |
| 11 | 2/3 |
As shown in table 9, give η with each index assignment
RSIndividual value, and therefore BS can replace η by only using simply
RSThe index of individual value comes to MS notice power ascension value.
Following table 10 has been summed up situation about being used for not using empty RE, is that even power emission pattern (pattern 1) or non-homogeneous power emission pattern (pattern 2) are come the formula of alpha value calculated according to number of antennas and emission mode.
[table 10]
Particularly, table 10 has illustrated in comprising the 4Tx system of four transmitting antennas, the power ratio in even power emission pattern (pattern 1) and non-homogeneous power emission pattern (pattern 2).According to comprise be used for antenna port 0,1} or antenna port 2, the OFDM symbol of the RS of 3}, the power ratio of two types of RE in even power emission pattern can be categorized as two types α value.
For example, if the OFDM symbol comprise be used for antenna port 0, the RS of 1}, then α
1Be illustrated in comprise be used for antenna port 0, data RE in the OFDM symbol of the RS of 1} and the power ratio between the data RE of the OFDM symbol that does not comprise RS.Yet, if the OFDM symbol comprise be used for antenna port 2, the RS of 3}, α
1Be illustrated in comprise be used for antenna port 2, data RE in the OFDM symbol of the RS of 3} and the power ratio between the data RE of the OFDM symbol that does not comprise RS.On the other hand, α
2Expression is used to remain the power ratio between the data RE of antenna port.
Following table 11 explanations are not in using the situation of empty RE, according to α value, RS lifting ratio and the number of antennas of power mode.
[table 11]
Table 11 is to use the table 9 of 3 bit map and 10 expression.Particularly, BS (or Node B) can use 3 bits to come to MS notice current power ratio.In table 11, the MSB of 3 bits represents power mode, and remains two bits and represent that RS promotes ratio η
RSFor example, if MSB is " 0 ", then MSB indicates even power emission pattern, and if MSB be " 1 ", then indicate non-homogeneous power emission pattern.After determining emission mode, BS can use two remaining bits, according to emission mode, promotes ratio to the MS notice.
Following table 12 is illustrated in the predetermined η ' in the situation of using empty RE
RSThe set of value.
[table 12]
In table 12, can use formula 5 to obtain η '
RS Value.In formula 5, the β value can be according to the time and dynamic change.Can also be set at the β value fixing according to channel circumstance or user's needs.If the β value in the table 12 is " 0 ", then empty RE is not used in this indication, and if the β value be " 1 ", then empty RE has been used in this indication.
Following table 13 has been summed up situation about being used for using RE, is still non-homogeneous power emission pattern (pattern 2) of even power emission pattern (pattern 1) according to number of antennas and emission mode, comes the formula of alpha value calculated.
[table 13]
Can reference table the formula of 13 explanations, obtain the α value according to the number and the emission mode of antenna.It is a table that table 12 and 13 can gather, and is similar to table 11.Particularly, by using the bitmap of 3 bits, can represent the α value efficiently according to the number and the emission mode of transmitting antenna.
In an embodiment of the present invention, can use therein in the OFDM symbol of RS RE, use empty RE with estimated rate.Can change the number of employed empty RE according to OFDM notation index and/or RB index.Only can use empty RE to specific cell or specific MS or subscriber equipment (UE).Can change the usage rate of empty RE according to the time in the specific cell and/or frequency.
Fig. 6 explanation method that is used to improve power according to another embodiment of the present invention.
In above embodiment, the multiple method that is used to promote guide symbol power has been described.For example, BS can promote the power of distributing to guide symbol by the power that convergent-divergent is distributed to data RE, perhaps can use empty RE to promote guide symbol power.
As shown in Figure 6, at first, the method for enhancing power that BS is identified for using (S601, S602).
In order to promote guide symbol power, BS can at first determine to use the power of distributing to data RE.Herein, BS can determine whether use empty RE (S603) once more.
Do not re-use in the situation of sky RE in the BS decision, BS can only use data RE to promote guide symbol power (S605).
At step S602 place, BS can at first promote guide symbol power by using empty RE to decide.Herein, BS can determine whether use data RE (S604) once more.
Determined not use in the situation of data RE at BS, BS can only use empty RE to promote guide symbol power (S606).
Determined to use in the situation of empty RE at the step S603 BS of place, BS can use data RE and empty RE to promote guide symbol power (S607).Determined to use in the example of data RE at the step S604 BS of place, BS can use empty RE and data RE to promote guide symbol power (S607).
BS will at first use which kind of method in two kinds of methods (the empty RE of a kind of use, the another kind of data RE that uses) to come can change according to user's selection or channel circumstance at step S607 place lifting guide symbol power.
The invention pattern
To carry out optimal mode of the present invention different embodiment has been described.
Industrial Applicability A
It will be apparent to one skilled in the art that in the situation that does not depart from spirit of the present invention or essential characteristic, can implement the present invention with other particular forms that are different from this paper elaboration. Therefore, more than description all is interpreted as illustrative and not restrictive in all respects. Scope of the present invention should be determined by the reasonable dismissal of claims, and the institute that is intended to occur in equivalent scope of the present invention changes and all is included in range of the present invention. Obviously, after submitting the application to, do not express complementary claim and can combine to provide embodiment, perhaps can increase new claim via revising.
Claims (12)
1. one kind is used for transmitting information efficiently and the method for bring to power, and described method comprises:
Divide first resource element that is used in bring to power, the information resources element that is used to distribute second resource element of steering signal and is used for data transmission is arrived the predetermined resource district;
The power of described first resource element is distributed in use, promotes at least one the power in described second resource element and the described information resources element; And
Use described predetermined resource district, launch described information.
2. the method for claim 1, wherein described first resource element is used for measuring interference by neighbor base station caused at many cell environments.
3. method as claimed in claim 1 or 2, wherein, described predetermined resource district comprises:
First sign field, described first sign field comprise described first resource element, described second resource element, described information resources element; And
Second sign field, described second sign field comprises described information resources element.
4. method as claimed in claim 3 wherein, according to the number of described transmitting antenna, is determined the number of described second resource element.
5. method as claimed in claim 3, wherein, described predetermined resource district further comprises:
The 3rd sign field, described the 3rd sign field comprise described second resource element and described information resources element.
6. method as claimed in claim 5 wherein, via first transmitting antenna and second transmitting antenna, is transmitted in described second resource element that comprises in described first sign field.
Via the 3rd transmitting antenna and the 4th transmitting antenna, be transmitted in second resource element that comprises in described the 3rd sign field.
7. method as claimed in claim 3, wherein, the step that promotes described power comprises: promote in the number of considering described first resource element and control under the situation of controlling elements of how much power, promote the power of described second resource element.
8. method as claimed in claim 3, wherein, use value (q) is calculated information resources element that comprises and the power ratio (α) between the information resources element that comprises in described second sign field in described first sign field, described value (q) is to obtain divided by: the sum of described resource element (m) deducts number (r) the sum gained of the number (e) of described first resource element that comprises and described second resource element in described first sign field value by the resource element sum (m) that will comprise in described first sign field.
9. method as claimed in claim 3, wherein, the step that promotes described power comprises: all power that will distribute to described first resource element are reallocated to described second resource element.
10. method as claimed in claim 3, wherein, the step that promotes described power comprises: will distribute to all power of described first resource element, and reallocate to described second resource element and described information resources element with estimated rate.
11. method as claimed in claim 3 wherein, under the situation of the sum of the described resource element that comprises and the number of described second resource element, is determined the number of described first resource element in considering described first sign field.
12. method as claimed in claim 3, wherein, the step that promotes described power comprises: will distribute to described first and the part power of information resources element reallocate to described second resource element.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US3243708P | 2008-02-29 | 2008-02-29 | |
| US61/032,437 | 2008-02-29 | ||
| KR10-2008-0073516 | 2008-07-28 | ||
| KR1020080073516A KR20090093758A (en) | 2008-02-29 | 2008-07-28 | Method of efficient power boosting |
| PCT/KR2009/000958 WO2009108011A1 (en) | 2008-02-29 | 2009-02-27 | Method of efficient power boosting |
Publications (1)
| Publication Number | Publication Date |
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| CN101960740A true CN101960740A (en) | 2011-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801070121A Pending CN101960740A (en) | 2008-02-29 | 2009-02-27 | Method of efficient power boosting |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20110003567A1 (en) |
| EP (1) | EP2258058A4 (en) |
| JP (1) | JP2011517382A (en) |
| KR (1) | KR20090093758A (en) |
| CN (1) | CN101960740A (en) |
| WO (1) | WO2009108011A1 (en) |
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| KR101375531B1 (en) * | 2008-03-14 | 2014-03-17 | 삼성전자주식회사 | Apparutus and method for resource allocation in broadband wireless communication system |
| WO2009135516A1 (en) * | 2008-05-09 | 2009-11-12 | Nokia Siemens Networks Oy | Multi-cell channel estimation in 3g-lte based virtual pilot sequences |
| KR101719818B1 (en) | 2009-03-23 | 2017-03-27 | 엘지전자 주식회사 | Method and apparatus for transmitting reference signal in multiple antenna system |
| US11218194B2 (en) * | 2009-03-23 | 2022-01-04 | Lg Electronics Inc. | Method and apparatus for transmitting reference signal in multi-antenna system |
| CN101873601A (en) * | 2009-04-27 | 2010-10-27 | 松下电器产业株式会社 | Method and system for setting reference signal in wireless communication system |
| WO2011054148A1 (en) | 2009-11-06 | 2011-05-12 | 华为技术有限公司 | Method and device for resource configuration |
| CN102227942A (en) * | 2009-11-06 | 2011-10-26 | 华为技术有限公司 | Method and device for resources allocation |
| CN102404055B (en) * | 2010-09-10 | 2014-06-18 | 电信科学技术研究院 | Method, system and device for measuring interference |
| EP2533582A1 (en) * | 2011-06-09 | 2012-12-12 | Alcatel Lucent | A method for transmission of reference signals, a base station and a user terminal therefor |
| CN102355724B (en) * | 2011-08-09 | 2017-05-24 | 中兴通讯股份有限公司 | Method and base station for notifying power information |
| US9049730B2 (en) * | 2011-11-14 | 2015-06-02 | Qualcomm Incorporated | Uplink data transmission with interference mitigation |
| US20130201917A1 (en) * | 2012-02-08 | 2013-08-08 | Qualcomm Incorporated | Dynamic indication of traffic to pilot (t/p) ratios |
| CN104885514B (en) | 2012-11-01 | 2019-05-21 | 英特尔公司 | The signal of qos requirement and UE power preference is sent in LTE-A network |
| US9277509B1 (en) | 2013-09-12 | 2016-03-01 | Sprint Communications Company L.P. | Dynamic power boosting based on contiguous and non-contiguous coverage |
| US9473371B2 (en) * | 2014-03-27 | 2016-10-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and server for dynamically determining a reference signal (RS) power boost level |
| KR102608282B1 (en) * | 2017-03-24 | 2023-11-30 | 삼성전자주식회사 | Method and apparatus for non-contention random access and uplink power control in wireless communication system |
| US11224068B2 (en) * | 2017-03-24 | 2022-01-11 | Samsung Electronics Co., Ltd. | Method and apparatus for contention-free random access and uplink power control in wireless communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7292552B2 (en) * | 2002-03-14 | 2007-11-06 | Qualcomm Incorporated | Method and apparatus for reducing interference in a wireless communication system |
| US7035284B2 (en) * | 2002-03-14 | 2006-04-25 | Qualcomm Incorporated | Method and apparatus for reducing inter-channel interference in a wireless communication system employing a non-periodic interleaver |
| US7593356B1 (en) * | 2002-06-25 | 2009-09-22 | Cisco Systems, Inc. | Method and system for dynamically assigning channels across multiple access elements in a wireless LAN |
| US7450549B2 (en) * | 2003-08-05 | 2008-11-11 | Via Telecom Co., Ltd. | Pilot signal enhancements for a wireless communication system |
| CN101536334B (en) * | 2006-11-01 | 2014-01-15 | 高通股份有限公司 | Reference signal design for cell search in an orthogonal wireless communication system |
| US9281917B2 (en) * | 2007-01-03 | 2016-03-08 | Nokia Technologies Oy | Shared control channel structure |
| US8369450B2 (en) * | 2007-08-07 | 2013-02-05 | Samsung Electronics Co., Ltd. | Pilot boosting and traffic to pilot ratio estimation in a wireless communication system |
| KR101397248B1 (en) * | 2007-12-16 | 2014-05-20 | 엘지전자 주식회사 | Method for transmitting data in multiple antenna system |
-
2008
- 2008-07-28 KR KR1020080073516A patent/KR20090093758A/en not_active Application Discontinuation
-
2009
- 2009-02-27 US US12/920,068 patent/US20110003567A1/en not_active Abandoned
- 2009-02-27 EP EP09714730A patent/EP2258058A4/en not_active Withdrawn
- 2009-02-27 WO PCT/KR2009/000958 patent/WO2009108011A1/en active Application Filing
- 2009-02-27 JP JP2010548621A patent/JP2011517382A/en active Pending
- 2009-02-27 CN CN2009801070121A patent/CN101960740A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009108011A1 (en) | 2009-09-03 |
| US20110003567A1 (en) | 2011-01-06 |
| EP2258058A4 (en) | 2011-10-26 |
| KR20090093758A (en) | 2009-09-02 |
| EP2258058A1 (en) | 2010-12-08 |
| JP2011517382A (en) | 2011-06-02 |
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